Sachusetts



G. GRAY. ELECTRIC GoNDUoToR.

NO. 592,703. Patented-Oct. 26,1897.

FIGJ.

UNITED STATES PATENT OFFICE. D

GORHAM GRAY, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO JOSEPH M. DOVVNEY AND WILLIAM J'. DOWNEY, OF HYDE PARK, MAS- SACHUSETTS.

ELI-:cil-Rlc:v CONDUCTOR.

SPEGIFIOATION forming part of Letters Patent No. 592,903, dated october 26, 18er'. Application nea December 4,1896. sel-n1 No. 614,455. (No man.)

To all whom it may concern.: i

Be it known that I, GORHAM' GRAY, of Bos# ton, in the county of Suolkand State of Massachusetts, have invented certain new and useful Improvements in Electric Conductors, of Whichlthe following is a full', clear, and exact description.

This invention will be lfully described hereinafter and embodied in the claim.

Reference is to be had to the accompanying drawings, forming a part ofv this specification, in which similar characters of reference indiparts inl all the figures. Figure -1 is a longitudinalV elevation of the conductor with part in section. Fig. 2 is a transverse section of the same on the line 2 2 Yof Fig. 1,`and,Fig. 3 is a similar view of the same on the line 3 3 of Fig. 1.

The conductor is made of a piece of 'metal formedwith'a series of longitudinal grooves A and a series of transversely-extending grooves B, thus leaving a cOreC, of hard metal,

andprojcctions D, of softer metal, thegsaid Having thus fully described my invention,

I claim as new and desire to secure by Letters Patent- A conductor having a continuous core and an outer portion divided by longitudinally and annularly extending grooves, the core.

being of material harder than that Of the outer portion, substantially as described.

GOEHAM GRAY. Witnesses: A HARRIETTE W. GEAY,

JOHN E. ABBOTT, 1

JOSEPH M. DOWNEY. 

